Boiler Superheater Tube,Boiler Water Distributor,Boiler Membrane Water Wall,Boiler Water Collector Jinan Yuanda Power Equipment Co.,Ltd. , https://www.jnyuandaboilers.com
Water pump room type more, according to the pump layer set location can be divided into ground type, underground type and semi-underground type. Ground pump room has the advantages of convenient construction, low cost and good operating conditions, but at the same time there is the need to start before the pump water diversion and other shortcomings; and underground pumping station pump start more convenient, the disadvantage is that more timber, complex construction, cost High, not as good as the ground environment, easy to be flooded, daily operation and management is not convenient, need to climb the stairs up and down.
In recent years, some construction units, regardless of the actual situation, but to visit the field to see some of the more common, more popular, come back and simply the same choice , Has brought hidden trouble for the later production operation.
In fact, the choice of pump room type has its own influence factors, including:
1. Unit layout
Pumping unit arrangement is the main content of the pump station layout, which determines the size of pump room floor area, unit layout should maintain safe operation, handling, maintenance and management convenience.
2. Water source water level and amplitude
The level of water level is directly related to the installation height of the pump. When the water level is low, in order to meet the requirements of the water absorption performance of the water pump, the pump shaft height must be correspondingly reduced, and even an underground pump house can be used to meet this requirement; otherwise, the pump shaft height can be properly raised when the water level is high. Therefore, the level of the water level is undoubtedly one of the constraints of pump room type selection.
The changing range of water level is another constraint to choose the type of pump room. Larger water level changes, we must take measures to ensure water safety at low water levels. Such as the use of underground pump room or removable water pump room.
Jiangnan area groundwater as the water source of water purification plant, water source amplitude amplitude is small, generally less than the pump effective suction, water purification plant natural ground elevation slightly higher than the highest water level. Due to the simple structure of the ground-type pump room, timber province, easy construction, low cost, high safety, ventilation and lighting moisture and other conditions are better, so this type of water plant should focus on the ground pump room or semi-underground pump room . Groundwater as the water source of water or water level fluctuate larger surface water plants, the main consideration should be to use underground pump room to ensure that the water pump to meet the performance.
In addition, the change of water level directly affects the safety of pumping station and the normal operation of the pump. Therefore, while reducing the pump installation elevation to meet the pump water absorption performance requirements, it must also take measures such as impermeable structure to prevent the high water level on the pump house submerged danger.
3. Water pump performance
As we all know, pump room depth and pump room type, the vast majority of cases depends on the installation of the pump height, and pump installation height is directly related to the water absorption of the pump, the pump has its rated allowable suction vacuum height, the value The larger, means that the pump shaft and water surface elevation difference can be larger, the pump shaft can be raised accordingly, and even ground pump room. Conversely, the pump shaft elevation must be reduced and the pump room depth must be correspondingly increased.
Water purification plants commonly used pumps horizontal centrifugal pump, the general suction allows the vacuum height of about 5 meters.
When we determine the type of pump room, under the premise of ensuring that cavitation does not occur, we should make full use of the suction pump allows the vacuum height, even with underground or semi-underground pump room, but also to minimize the depth of the pump station , Reduce project cost.
4. Pump suction pipe
Suction pipe should be to minimize pipe fittings, reducing the length of the suction pipe, and to prevent submerged suction pipe inlet depth is not enough, resulting in inhalation. The greater the pump installation height, the longer the water absorption pipe, pump house selection must also be noted.
5, civil construction requirements
The civil structure of the pump station should be able to meet the requirements of process layout, such as impermeability, anti-floating, fire protection, communication, electrical and drainage in the pump room, etc. All of them are directly related to the type of pump room. , It should also be considered.
6, groundwater level
The impact of groundwater level on the type of pumping station is also large. The groundwater level is too high, so it is inevitable to consider the impermeability and anti-floating conditions of the pumping station. This can be solved by lifting the pumping station. When taking the underground pumping station, the impermeability of the pumping station should be strengthened to prevent the leakage of water. At the same time, the influence of hydrostatic pressure should be taken into account to avoid the structural damage and the floating up of the cylinder.
7, water pump way
Water purification plants and more as a centrifugal pump as the main model, before starting the pump must be diversion, diversion many ways, such as self-filling, vacuum pumping and filling pressure water. Various types of diversion have their own advantages and disadvantages, corresponding to the type of pump room is also different, such as self-priming water diversion must ensure that the water level is always higher than the pump shaft, which is generally used in underground pump room; vacuum can be Appropriate to raise the pump shaft height, in the ground and semi-underground pump station more application; filling pressure water (such as tap water) is relatively flexible, in various types of pumping stations are widely used.
Taking Chaohu Water Supply Co., Ltd. as an example, two water meters with a diameter of 1 meter flow into the raw water collecting well, and the embankment sluice gate valve is provided in the pipe. A butterfly valve is provided in front of the water collecting well, ensuring safety and convenience Water diversion, the design used semi-underground type, put into operation in 1994 has been running well.
in conclusion:
There are many factors that affect the type of pumping station. Generally, the main factors that should be taken into account are the water level and amplitude variation of the water source, the water absorption performance of the water pump (allowing suction of the vacuum level), etc., which are the decisive factors in determining the type of pumping station. For example: when the water level and the ground elevation is not large, to meet the water pump performance requirements and water amplitude amplitude is not large, you can choose ground pump room; water source water level is very low or large amplitude, should be considered underground or Semi-underground type, and then decide on its extension. After initially identifying one or more types of pump room, combined with other factors (water diversion, foundation conditions, economic factors, etc.) to consider and determine the final ideal solution. For example, taking into account the convenience of water diversion, the use of self-filling water diversion, you can appropriately increase the depth of pump room.
In addition, such as the type of pump, type, water diversion equipment, etc. also affect the type of pump room, we determine the specific type of work, should be a combination of many influencing factors, based on objective and realistic conditions to be a specific analysis and comparison programs, options The most reasonable pump room type, must not blindly follow.
The main pressure parts in a boiler will be as follows:Drums, Water walls, Super heaters, Re heaters, Economisers and valves & fittings. The Drum, Down comers, water wall headers and water walls will form the circulation system and cover the furnace zone.
The selection of water pump plant type is reasonable, not only related to the total investment in construction, and will directly determine the safe operation of its put into operation, to facilitate management. In this paper, the general type two pumping station type selection, for example, to discuss its main influencing factors, to provide colleagues with a train of thought to avoid the choice of pumping into the wrong place.